This needs a SPOILER tag since it talks about River in the context of the BDM.

Well, it doesn't. So, no spoiler tag necessary. Any information about the plot, additional (non-Firefly) characters, gadgets, etc. that make up the events of Serenity, the movie, would be a spoiler. This review discusses Firefly, the series, only.

I guess it would be spoilerish for anyone who hasn't seen the series but wants to see the movie? But in regards to River being talked about in context of the BDM I just don't see it. Everything mentioned about River is something we knew about her from the series. I think anyone clicking on that link realizes that the series is going to be be talked about so if they haven't seen the series and want to remain unspoiled about certain plot and character developments don't read the article. If you've already seen Firefly there isn't anything in the article that gives away anything in the movie that wasn't already established on the series.

Is anyone else a little apprehensive about River's antics in the trailer? I know it appears she has been given special powers because of her shooting in "War Stories" but that was more kind of psychic because she pinpointed where the men were without looking. But in the Serenity trailer, she's kicking bad guys rather like a certain vampire slayer we all know and love.

Personally I was hoping that Joss wouldn't go down the route of using a similar, physically strong girl like Buffy, because we get that in a lot of TV shows and films since Buffy, such as Sydney Bristow from Alias and Trinity from the Matrix. I think it would be more interesting for River to just use psychic power or something like that, instead of being your typical tough female action hero.

I could be wrong, perhaps Joss will execute it originally. Could anyone who has seen the film tell me their opinion without spoilers? Just if they thought it was different enough from Buffy?

I'm a little concerned about Razor's question. Pretty much any answer regarding the extent of River's abilities in Serenity is going to be spoilery.

If anyone wants to respond to Razor, PLEASE use invisible text, which you can find out how to do here.

(ETA: That said, I had a very similar concern re River in light of what the trailer showed us. Nevertheless, I'm just going to have to wait until September to find out how it all fits together . . . or doesn't.)